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STP is
a. standard temperature and pressure.
b. 0 °C and 1 atm pressure.
c. 0 °C and 101.3 kPa.
d. all of these
Answer
D. all of these
Which of these statements about dissolving gases in liquid solvents is true?
a. Increasing the temperature makes gases more soluble.
b. Increasing the pressure increases the solubility of a gas.
c. Stirring increases the solubility of a gas in a liquid solvent.
Answer
B. Increasing the pressure increases the solubility of a gas.
Which of the following would be classified as an acid according to the Arrhenius definition?
a. NaCl
b. Ca(OH)2
c. H2CO3
d. BaBr2
Answer
c. H2CO3
Which of the following is NOT a characteristic of a base?
a. turns acid-base indicators different colors
b. feels slippery to the touch
c. tastes sour
d. is an electrolyte
Answer
c. tastes sour
If you came upon an aqueous solution in the lab which reacted with a strip of magnesium, you could make the hypothesis that the compound in this solution is:
a. an acid.
b. a base.
c. a salt.
Answer
a. an acid.
Name the following base—KOH.
a. potassium base
b. hydropotassium base
c. potassium hydroxide
d. hydropotassium hydroxide
Answer
c. potassium hydroxide
Name the following acid—H2CO3.
a. hydrocarbonic acid
b. carbonic acid
c. carbonous acid
d. hydrocarbonous acid
Answer
b. carbonic acid